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This PT20 Track Pack is the ultimate in portable energy. This Track Pack system, based on the 20 lb. Power Tank size tank, weighs only 50 lb. full and can be carried from one vehicle to another in it's protective padded Speed Bag. Imagine carrying enough instant air to inflate forty-nine (49) high pressure trailer tires from 20-50 PSI or run an impact wrench long enough to remove 720+ lug nuts with no plugs, generators, or lines.